FERROXCUBE
DATA SHEET
3R1
Material specification
Supersedes data of September 2004
2008 Sep 01
Ferroxcube
Material specification
3R1 SPECIFICATIONS
MnZn ferrite with a nearly rectangular hysteresis loop
for use in magnetic regulators/amplifiers.
SYMBOL
µ
i
B
CONDITIONS
25
°C; ≤10
kHz;
0.25 mT
25
°C;
10 kHz;
1200 A/m
100
°C;
10 kHz;
1200 A/m
from 1 kA/m;
25
°C
from 1 kA/m;
100
°C
from 1 kA/m;
25
°C
from 1 kA/m;
100
°C
DC; 25
°C
VALUE
800
±20%
≈
410
≈
340
≥
310
≥
220
≤
52
≤
23
≈
10
3
≥
230
≈
4700
Ωm
°C
kg/m
3
A/m
10
10
1
1
10
f (MHz)
3R1
handbook, halfpage
10
4
MBW061
3R1
UNIT
µ'
s ,
µ''
s
10
3
µ'
s
mT
µ''
s
B
r
mT
10
2
H
c
10
2
ρ
T
C
density
Fig.1
Complex permeability as
a function of frequency.
handbook, halfpage
5000
µ
i
4000
MBW062
3R1
handbook, halfpage
500
MBW018
B
(mT)
400
25oC
100oC
3R1
3000
300
2000
200
1000
100
0
50
0
50
150
T (
o
C)
250
50
0
50
100
500
H (A/m)
1000
Fig.2
Initial permeability as a
function of temperature.
Fig.3 Typical B-H loops.
2008 Sep 01
200
Ferroxcube
Material specification
3R1
handbook, halfpage
10
4
MBW001
1 MHz
400 kHz
3R1
handbook, halfpage
800
MBW002
3R1
f
B
(kHz) (mT)
Pv
(kW/m
3
)
Pv
(kW/m
3
)
600
100 kHz
10
3
100
25 kHz
100
200
400
10 kHz
30
10
2
200
10
10
1
10
10
2
B (mT)
10
3
200
0
0
40
80
120
T (
o
C)
Fig.5
Fig.4
Specific power loss as a function of peak
flux density with frequency as a parameter.
Specific power loss for several
frequency/flux density combinations
as a function of temperature.
Remark:
When 3R1 ring cores are driven exactly at their natural
mechanical resonant frequencies a magneto-elastic
resonance will occur. With large flux excursions and no
mechanical damping, amplitudes can become so high that
the maximum tensile stress of the ferrite is exceeded.
Cracks or even breakage of the ring core could be the
result. It is advised not to drive the toroidal cores at their
radial resonant frequencies or even subharmonics (e.g.
half this resonant frequency).
Resonant frequencies can be calculated for any ring core
with the following simple formula:
5700
-
f
r
=
--------------------------- kHz
D
o
+
D
i
π
------------------
-
2
where:
f = radial resonant frequency (kHz)
D
o
= outside diameter (mm)
D
i
= inside diameter (mm).
2008 Sep 01
201
Ferroxcube
Material specification
DATA SHEET STATUS DEFINITIONS
DATA SHEET
STATUS
Preliminary
specification
Product specification
PRODUCT
STATUS
Development
DEFINITIONS
3R1
This data sheet contains preliminary data. Ferroxcube reserves the right to
make changes at any time without notice in order to improve design and
supply the best possible product.
This data sheet contains final specifications. Ferroxcube reserves the right
to make changes at any time without notice in order to improve design and
supply the best possible product.
Production
DISCLAIMER
Life support applications
These products are not designed for use in life support appliances, devices, or systems
where malfunction of these products can reasonably be expected to result in personal injury. Ferroxcube customers
using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Ferroxcube
for any damages resulting from such application.
PRODUCT STATUS DEFINITIONS
STATUS
Prototype
Design-in
Preferred
Support
INDICATION
DEFINITION
These are products that have been made as development samples for the purposes of
technical evaluation only. The data for these types is provisional and is subject to
change.
These products are recommended for new designs.
These products are recommended for use in current designs and are available via our
sales channels.
These products are
not
recommended for new designs and may not be available
through all of our sales channels. Customers are advised to check for availability.
2008 Sep 01
202
京公网安备 11010802033920号
EEWORLD
